Okay, from someone who's experienced the Extra Magic Hours.... Each park has one early opening and one late closing each week. However, the days that the extra hours occur vary, so that, if one park opens early on Tuesday on one week, it could open early on Wednesday (or any other day) the next week. This staggering of times should prevent the hours from getting overly late, as the Magic Kingdom hours would imply. Also, the attractions open early differ from the ones closed late. In most cases the evening attractions consist of the morning attractions plus several more attractions (I think Pangani Forest and Maharajah Jungle in Animal Kingdom are the only attractions open during early mornings but not late evenings). Not only are several rides open during extra hours, but some shows will add extra showtimes if their parks are open late. As for the Tower of Terror and Rock'n'Roller Coaster "problem", these lines are considerably shorter during the extra hours, partly due to no fastpasses during extra hours. There are other attractions open during the extra hours, however: StarTours, Muppet*Vision 4D, and The Great Movie Ride. If all the hype is true, I would expect Lights, Motors, Action! to also be an extra hours attraction as well, and would therefore decrease the crowds on Sunset Boulevard. And the extra evening hours at Animal Kingdom has Dinoland U.S.A. and the Festival of the Lion King show open, not Africa or Asia (but maybe Kali River Rapids, I'm not sure). Expedition Everest probably will also be open late, when it does open. However, I do have one slight complaint with the Animal Kingdom hours: I expected to see plenty more carnival lights at the Dino-Rama section, not just bright normal lights.